SCIURUS. 



91 



NOTE XIII. 



LIST OF THE SPECIMENS OE SQUIRRELS 

 IN THE LEYDEN MUSEUM. 



BY 



Dr. P. A. JENTINK. 



February 1883. 



AMERICAN SQUIRRELS. 



The profound and extensive studies upon the American 

 Squirrels by Allen ^) and Alston"), have made this group , 

 we must confess it, one of the best known among the 

 Mammals. At the same time however the named authors 

 have shown that it is almost an impossibility to give a good 

 and exact diagnosis of an American Squirrel, because the 

 specimens of a given species differ , so to say , infinitely 

 in the hairiness of the ears, which are tufted or not tufted, 

 in the length and strength of the body, a. s. o. The 

 difficulty increases as these variations are to be found not 

 constantly in individuals from different localities, but as 

 they often are present in individuals from the same loca- 

 lity and gathered on the same day or in the same season. 



1) Monographs of North American Kodentia. N". XI. Sciuridae. 1877. p. 

 p. 631—779. 



2) On the Squirrels of the Neotropical Region. P. Z. S. L. 1878. p. p. 656— 

 670. Plate XLl. 



Notes from tlie Leyden Mluseuin, Vol. V. 



